Hard wired programmable controller especially for heating ventil

Details Hard wired programmable controller especially for heating ventil Hard wired programmable controller especially for heating ventil

1991-02-22

1993-03-30

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082506, 34082583, 307 39, 307139, H02J 314

Patent

active

051988097

ABSTRACT:
Inputs are programmably interfaced and interlocked with output so that the state of the outputs and the operation of equipment connected thereto depends on the hierarchy or priority (control strategy) which is programmed into the controller. The inputs may be contacts (switch closures) of switches which are thrown to operate HVAC units and high or low limit sensors such as thermostats and pressure sensors of an HVAC system. The outputs operate the motor controls of motors which drive the blowers, fans, pumps, dampers and the like of the HVAC system for environmental control and the safety both of the occupants of a facility and the HVAC equipment therein. The programmable controller has an on-matrix and an off-matrix of switch points which are arranged in columns and rows. Each row of switch points is connected to an input circuit. The columns of switch points in the on-matrix are connected to the outputs via control logic to which each column of switch points is connected. Each input is connected through control logic which is capable of reversing the logic state presented by the input so that a normally asserted input (e.g. a normally closed contact of a low limit sensor) is asserted when the contact opens.

REFERENCES:
patent: 3622990 (1971-11-01), Lerch
patent: 4032894 (1977-06-01), Williams
patent: 4180744 (1979-12-01), Helwig, Jr.
patent: 4307379 (1981-12-01), Wyland
patent: 4766569 (1988-08-01), Turner et al.
patent: 4908498 (1990-03-01), Kivela

Affiliated with

Also associated with

Rating

Hard wired programmable controller especially for heating ventil does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hard wired programmable controller especially for heating ventil, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hard wired programmable controller especially for heating ventil will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1284131